Question 15

The daily high temperature for San Francisco is 21 degrees Celsius.

To convert the daily high temperature of San Francisco from degrees Fahrenheit to degrees Celsius using the formula F = (9/5)C + 32, we can rearrange it to solve for C. Given that the temperature in Fahrenheit is typically around 70 degrees for a daily high in San Francisco, we find that this corresponds to approximately 21 degrees Celsius.

A) 15

This option is incorrect because a temperature of 15 degrees Celsius is equivalent to 59 degrees Fahrenheit, which is significantly lower than the typical daily high for San Francisco. The expected high is much closer to 70 degrees Fahrenheit.

B) 17

Choosing 17 degrees Celsius corresponds to roughly 62.6 degrees Fahrenheit. While this is a bit closer to typical temperatures, it still does not align with the expected high temperature for San Francisco, which is more accurately represented by a higher value.

C) 21

This option is correct as 21 degrees Celsius translates to 69.8 degrees Fahrenheit, which is consistent with the average daily high temperature for San Francisco. This makes it the most accurate representation of the high temperature in Celsius.

D) 25

A temperature of 25 degrees Celsius is approximately 77 degrees Fahrenheit, which exceeds the usual daily high for San Francisco. This is therefore an incorrect choice as it suggests a temperature higher than what is typically experienced.

E) 29

This choice is incorrect as 29 degrees Celsius is equivalent to about 84.2 degrees Fahrenheit, which is unusually high for San Francisco. This temperature is not representative of the average daily high in the city.

Conclusion

The correct answer, 21 degrees Celsius, accurately reflects the daily high temperature for San Francisco when converted from Fahrenheit. All other options either underestimate or overestimate the expected temperature range, making them unsuitable choices based on the context of the question.